Spencer Ackerman is learning this one the hard way, after having stained his tie ahead of his Al Jazeera English TV appearance: always keep a spare necktie at the office. Preferably, one that goes with anything. (Mine’s solid red with a subtle textured pattern.)
For good measure, I keep an old navy blazer and a spare white shirt there, too. You never know when you’ll need ‘em, either because you’ve spilled something or because you suddenly need to be dressed more formally than you thought.